/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.tsfile.read.expression.impl;

import org.apache.iotdb.tsfile.read.expression.ExpressionType;
import org.apache.iotdb.tsfile.read.expression.IBinaryExpression;
import org.apache.iotdb.tsfile.read.expression.IExpression;
import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils;

import java.io.Serializable;
import java.nio.ByteBuffer;
import java.util.Objects;

public abstract class BinaryExpression implements IBinaryExpression, Serializable {

    private static final long serialVersionUID = -711801318534904452L;

    public static AndExpression and(IExpression left, IExpression right) {
        return new AndExpression(left, right);
    }

    public static OrExpression or(IExpression left, IExpression right) {
        return new OrExpression(left, right);
    }

    @Override
    public abstract IExpression clone();

    protected static class AndExpression extends BinaryExpression {

        public IExpression left;
        public IExpression right;

        public AndExpression(IExpression left, IExpression right) {
            this.left = left;
            this.right = right;
        }

        @Override
        public IExpression getLeft() {
            return left;
        }

        @Override
        public IExpression getRight() {
            return right;
        }

        @Override
        public void setLeft(IExpression leftExpression) {
            this.left = leftExpression;
        }

        @Override
        public void setRight(IExpression rightExpression) {
            this.right = rightExpression;
        }

        @Override
        public ExpressionType getType() {
            return ExpressionType.AND;
        }

        @Override
        public IExpression clone() {
            return new AndExpression(left.clone(), right.clone());
        }

        @Override
        public void serialize(ByteBuffer byteBuffer) {
            ReadWriteIOUtils.write((byte) getType().ordinal(), byteBuffer);
            left.serialize(byteBuffer);
            right.serialize(byteBuffer);
        }

        @Override
        public String toString() {
            return "[" + left + " && " + right + "]";
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }

            if (o == null || getClass() != o.getClass()) {
                return false;
            }

            AndExpression that = (AndExpression) o;
            return Objects.equals(toString(), that.toString());
        }

        @Override
        public int hashCode() {
            return Objects.hash(toString());
        }
    }

    protected static class OrExpression extends BinaryExpression {

        public IExpression left;
        public IExpression right;

        public OrExpression(IExpression left, IExpression right) {
            this.left = left;
            this.right = right;
        }

        @Override
        public IExpression getLeft() {
            return left;
        }

        @Override
        public IExpression getRight() {
            return right;
        }

        @Override
        public void setLeft(IExpression leftExpression) {
            this.left = leftExpression;
        }

        @Override
        public void setRight(IExpression rightExpression) {
            this.right = rightExpression;
        }

        @Override
        public ExpressionType getType() {
            return ExpressionType.OR;
        }

        @Override
        public IExpression clone() {
            return new OrExpression(left.clone(), right.clone());
        }

        @Override
        public void serialize(ByteBuffer byteBuffer) {
            ReadWriteIOUtils.write((byte) getType().ordinal(), byteBuffer);
            left.serialize(byteBuffer);
            right.serialize(byteBuffer);
        }

        @Override
        public String toString() {
            return "[" + left + " || " + right + "]";
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }

            if (o == null || getClass() != o.getClass()) {
                return false;
            }

            OrExpression that = (OrExpression) o;
            return Objects.equals(toString(), that.toString());
        }

        @Override
        public int hashCode() {
            return Objects.hash(toString());
        }
    }
}
